--- /dev/null
+/*
+ * The PCI Library -- Configuration Access via AmigaOS 4.x expansion.library
+ *
+ * Copyright (c) 2024 Olrick Lefebvre <olrick.lefebvre@olrick.fr>
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL v2+.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#define _GNU_SOURCE
+
+#include <proto/exec.h>
+#include <exec/types.h>
+#include <proto/expansion.h>
+#include <interfaces/expansion.h>
+
+
+// have to undef PCI values to avoid redefine warning
+#undef PCI_BASE_ADDRESS_MEM_MASK
+#undef PCI_BASE_ADDRESS_IO_MASK
+#undef PCI_ROM_ADDRESS_MASK
+#include <expansion/pci.h>
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/unistd.h>
+
+#include "internal.h"
+
+
+// custom Amiga x.y version tag
+#define VERSTAG "\0$VER: pciutils " PCILIB_VERSION " (" PCILIB_DATE_AMIGAOS ") AmigaOS4 port"
+
+
+/*** AmigaOS access support ***/
+
+typedef struct _PCIAccess {
+ struct ExpansionBase *expansion;
+ struct PCIIFace *ipci;
+} PCIAccess;
+
+static void
+aos_close_pci_interface(struct pci_access *a)
+{
+ PCIAccess *pci = a->backend_data;
+
+ if (pci) {
+ if (pci->expansion) {
+ if (pci->ipci) {
+ IExec->DropInterface((struct Interface *)pci->ipci);
+ pci->ipci = NULL;
+ }
+ IExec->CloseLibrary((struct Library *)pci->expansion);
+ pci->expansion = NULL;
+ }
+ pci_mfree(pci);
+ a->backend_data = NULL;
+ }
+}
+
+static BOOL
+aos_open_pci_interface(struct pci_access *a)
+{
+ PCIAccess *pci;
+ BOOL res = FALSE;
+
+ if (NULL == a->backend_data) {
+ pci = pci_malloc(a, sizeof(PCIAccess));
+ a->backend_data = pci;
+ pci->expansion = (struct ExpansionBase *)IExec->OpenLibrary("expansion.library", 0);
+ if(NULL == pci->expansion) {
+ a->warning("Unable to open expansion.library");
+ aos_close_pci_interface(a);
+ } else {
+ pci->ipci = (struct PCIIFace *)IExec->GetInterface((struct Library *)pci->expansion, "pci", 1, TAG_DONE);
+ if(NULL == pci->ipci) {
+ a->warning("Unable to obtain pci interface");
+ aos_close_pci_interface(a);
+ } else {
+ res = TRUE;
+ }
+ }
+ } else {
+ res = TRUE; // already opened
+ }
+
+ return res;
+}
+
+static int
+aos_expansion_detect(struct pci_access *a)
+{
+ int res = FALSE;
+ struct PCIDevice *device = NULL;
+ PCIAccess *pci;
+
+ if(TRUE == aos_open_pci_interface(a)) {
+ pci = a->backend_data;
+
+ // Try to read PCI first device
+ device = pci->ipci->FindDeviceTags(FDT_Index, 0);
+ if(NULL == device) {
+ a->warning("AmigaOS Expansion PCI interface cannot find any device");
+ aos_close_pci_interface(a);
+ } else {
+ pci->ipci->FreeDevice(device);
+ res = TRUE;
+ }
+ }
+
+ return res;
+}
+
+static void
+aos_expansion_init(struct pci_access *a)
+{
+ // to avoid flushing of version tag
+ static STRPTR USED ver = (STRPTR)VERSTAG;
+
+ if (!aos_open_pci_interface(a)) {
+ a->debug("\n");
+ a->error("AmigaOS Expansion PCI interface cannot be accessed.");
+ }
+}
+
+static void
+aos_expansion_cleanup(struct pci_access *a)
+{
+ aos_close_pci_interface(a);
+}
+
+static void
+aos_expansion_scan(struct pci_access *a)
+{
+ struct PCIDevice *device = NULL;
+ PCIAccess *pci = NULL;
+ UBYTE bus_num;
+ UBYTE dev_num;
+ UBYTE fn_num;
+ struct pci_dev *d;
+ int found_devs = 0;
+
+ pci = a->backend_data;
+
+ // X1000 has a bug which left shifts secondary bus by one bit, so we don't scan but get all devices identified by the system
+ device = pci->ipci->FindDeviceTags(FDT_Index, found_devs);
+ while (device) {
+ d = pci_alloc_dev(a);
+ d->domain = 0; // only one domain for AmigaOS
+ device->GetAddress(&bus_num, &dev_num, &fn_num);
+ d->bus = bus_num;
+ d->dev = dev_num;
+ d->func = fn_num;
+ d->backend_data = device;
+ d->vendor_id = device->ReadConfigWord(PCI_VENDOR_ID);
+ d->device_id = device->ReadConfigWord(PCI_DEVICE_ID);
+ d->known_fields = PCI_FILL_IDENT;
+ d->hdrtype = device->ReadConfigByte(PCI_HEADER_TYPE) & ~PCI_HEADER_TYPE_MULTIFUNCTION;
+ pci_link_dev(a, d);
+ a->debug(" Found device %02x:%02x.%d %04x:%04x\n", d->bus, d->dev, d->func, d->vendor_id, d->device_id);
+
+ found_devs++;
+ device = pci->ipci->FindDeviceTags(FDT_Index, found_devs);
+ }
+}
+
+static int
+aos_expansion_read(struct pci_dev *d, int pos, byte *buf, int len)
+{
+ int res = FALSE;
+ byte *ptr = buf;
+ if (d->backend_data) {
+ for (int i = 0; i < len; i++) {
+ // byte by byte to avoid endianness troubles
+ *ptr = ((struct PCIDevice *)(d->backend_data))->ReadConfigByte(pos + i);
+ ptr++;
+ res = TRUE;
+ }
+ }
+
+ return res;
+}
+
+static int
+aos_expansion_write(struct pci_dev *d, int pos, byte *buf, int len)
+{
+ int res = FALSE;
+ byte *ptr = buf;
+
+ if (d->backend_data) {
+ for (int i = 0; i < len; i++) {
+ // byte by byte to avoid endianness troubles
+ ((struct PCIDevice *)(d->backend_data))->WriteConfigByte(pos + i, *ptr);
+ ptr++;
+ res = TRUE;
+ }
+ }
+
+ return res;
+}
+
+static void
+aos_expansion_init_dev(struct pci_dev *d)
+{
+ d->backend_data = NULL; // struct PCIDevice * to be obtained
+}
+
+static void
+aos_expansion_cleanup_dev(struct pci_dev *d)
+{
+ PCIAccess *pci;
+
+ if (d->backend_data && d->access->backend_data) {
+ pci = d->access->backend_data;
+ pci->ipci->FreeDevice((struct PCIDevice *)d->backend_data);
+ d->backend_data = NULL;
+ }
+}
+
+struct pci_methods pm_aos_expansion = {
+ "aos-expansion",
+ "The Expansion.library on AmigaOS 4.x",
+ NULL, // config, called after allocation of pci_access, if assigned
+ aos_expansion_detect, // detect, mandatory because called without check
+ aos_expansion_init, // init, called once access chosen, eventually after detect
+ aos_expansion_cleanup, // cleanup, called at the end
+ aos_expansion_scan,
+ pci_generic_fill_info,
+ aos_expansion_read,
+ aos_expansion_write,
+ NULL, // read_vpd
+ aos_expansion_init_dev,
+ aos_expansion_cleanup_dev,
+};
projects / pciutils.git / commitdiff